1 syllable:
ares, baars, bar's, barr's, barres, barrs, bars, barz, car's, carr's, carrs, cars, cars', charrs, chars, czar's, czars, far's, gars, gnars, guars, haars, jaars, jars, jmaars, jstars, kaars, kahr's, kahrs, laars, lars, lcars, maars, marres, marrs, mars, mars', marz, mg cars, nars, ours, paars, par's, parrs, pars, quarz, r's, r.'s, r.s, sars, scars, spars, staar's, star's, starr's, starrs, stars, stars', starz, star wrs, tahrs, thars, thouars, vars, z-cars

2 syllables:
abars, adars, afars, aldars, all-stars, alvars, amar's, amarres, asars, astars, azhar's, babar's, baibars, balkars, bazaars, bazars, beastars, blazars, boxcars, busbars, chukars, cigars, cigars', cottars, crossbars, crowbars, darkstars, deathstars, debars, denars, devoirs, dinars, disbars, durbars, dzhokhar's, feldspars, fiars, gaidar's, guitars, handcars, hectares, instars, ipars, jabar's, jaguar's, jaguars, jumars, lamar's, lamars, lazars, loadstars, lodestars, magyars, malars, melkar's, memoires, memoirs, minstar's, miroirs, mizar's, myanmar's, nightjars, northstar's, opars, pan-starrs, peignoirs, pieds-noirs, pop/stars, popstars, prankstars, prostars, qintars, racecars, radars, railcars, rebars, renoirs, sambars, sandbars, seskar's, shahar's, shofars, sidebars, sitars, sizars, sonars, streetcars, tbars, techstars, tigar's, tokars, toolbars, tramcars, trocars, unbars, velars, voussoirs, windstar's

3 syllables:
abattoirs, aerostar's, aerostars, alcazars, alpinestars, autocars, avatars, bryanstars, caviares, caviars, cinnabars, cojimar's, counting cars, escobar's, golden stars, handle-bars, hekmatyar's, humsafars, isobars, jaguar cars, kosovars, lotus cars, malabars, megastars, metrostars, millibars, minibars, minicars, morningstar's, motorcars, nayanars, npr's, pokerstars, protostars, registrars, reservoirs, ricercars, samovars, scimitars, seminars, sidecars, stars and bars, supercars, superstars, volvo cars, xchocobars

4 syllables:
almogavars, almucantars, parallel bars, put behind bars

5 syllables:
antimacassars, list of largest stars, nebuchadnezzars, rolls-royce motor cars, teleseminars

6 syllables:
afi's 100 years...100 stars, human mission to mars, rupaul's drag race all stars, the fault in our stars, thirty seconds to mars

7 syllables:
list of proper names of stars

3 syllables:
calipers, galliformes, man-at-arms, amateurs, catapres, challengers, clamatores, gadiformes, grandmother's, grandmothers, handlers, kalotermes, managers, mastotermes, passengers, travelers

4 syllables:
psittaciformes, parameters, ambassadors, examiner's

5 syllables:
pelecaniformes